I'm in the same boat. I have a MB1310 & 1320. The actual model numbers for my slides are CHRN-023L & CHRN-023R. Matco doesn't have the slides or the universal replacements. I was able to refurb every slide, but the tiny translucent yellow slide detents have crumbled, and I can't find...
And that's for half a drawer? Did they happen to give you a part number? I can probably salvage a lot of the ones I have. May not have a choice for a few of them, I can't find them anywhere else. They're 19" with a rivet and tabs. Just 19" slides are difficult to source, much less a direct...
I know this is an old post. I have 2 1300 boxes. A 1310 and a 1320. I need all of the detents too, but I also need some new slides. I mentioned I inherited the box, so Matco wasn't willing to help me with any warranty parts. They did say they would research the part number, but I still haven't...